Self-oiling diestock



:JV-VOWYHZOI/ E Justice E. C. JUSTICE SELF OILING DIESTOCK Filed Sept, 25, 1925 Nov. 16 1926.'

Patented Nov. 16,1926. I 1,507,451

UNITED STATES PATENT QFFIQE.

EARL 0. answer, or TULSA, OKLAHOMA.

snnr-orcnro nIEs'rooK.

Application filed September 23, 1925. Serial No. 58,145.

the sockets 5 and having their outer end portions internally threaded to receive nip- This invention relates to a die stock and one object of the invention is to so form the die stock that oil which is utilized to permit of t reads being easily cut in a pipe may be 5 carried in the handles of the die stock and fed to the portion ofthe pipe which is being threaded through valve controlled conduit. This makes it unnecessary to use an oil can in order to apply the oil to the pipe. It has been found that when the oil is kept in an oil can and applied to the pipe which is being threaded most of the oil which is discharged from the can is wasted as too much is applied to the pipe and the surplus drips onto the floor. 'VVaste is also caused due to the fact that the can will often fall onto the floor in an inverted position so that the oil drains out of it and very often the can will be lost by being dropped while traveling from one place to another or by being accidentally left when the pipe threader is moved from one place to another. By having the oil stored in the handles of the die stock which will hold more oil than an ordinary oil can, a large supply of oil may be keptready for immediate use and this supply of oil economically used as only the amount necessary to prop erly lubricate the threads being out will be discharged from the valve controlled conin, which would interfere with the applica duit at one time. 5 tion of oil to the pipe to be threaded but This invention is illustrated in the aocomwhen the handle is in an inverted position panying drawing, wherein Figure 1 is a View showing the improved thread cutter in elevation with a portion of one of the handles and the socket'into which it fits shown in longitudinal section;

Fig. 2 is a longitudinal sectional View taken on the line 22 of Fig. 1, and Fig. 3 is a transverse sectional view taken on the line 33 of Fig. 1.

The die stock which is indicated in general by the numeral 1 is formed with the usual pipe passage 2 to receive the pipe 45 which is to be threaded. A seat 3 is provided at the front of the die stock 1 and receives the dies 4 which are disposed at opposite sides of the pipe passage 2 and movable towards and away from each other so that they may be properly set to thread a pipe of a given diameter. At its ends the stock is formed with sockets 5 which are internally threaded and adapted to receive the handles 6, the handles consisting of lengths of pipe externally threaded at their inner ends so that they may be screwed into of the caps 8 is provided with an air inlet port 9 beyond the outer end of the nioplo engaged by this cap, and this nipple has the outer end portion of its bore 10reduced to form a valve seat 11 for engagement by the nipple, so that oil may be prevented from leaking out of the handle when in a depending POSIUOIL- An abutment 13 is provided to prevent, sliding of the valve handle. The other cap which is intended to be removed when it is necessary to fill the handles with oil which will flow from one handle to the other through the conduit 15 will be an imperforate cap and the nipple upon which this cap fits will have its axially extending bore or passage sufiiciently large to permit the oil to be readily poured through the same into the handle. By having the cap shown at the left in Fig. 2 formed with the port 9 and inwardly opening check valve, air may enter the handle outwardly through the port 9.

In the present illustration, the conduit 15 has been shown formed of separate pipe sections 16 connected at their adjacent ends by a T-eoupling 17 and their outer ends seinto threaded openings 20 formed in the inner ends of the sockets 5. It will be understood, however, that the conduit may if so desired be cast integral with the die stock or secured thereto in any other prac tical manner. A branch 21 which is formed as an elbow enlarged intermediate its length to form a valve housing 22 has one end screwed into the T-coupling and its other end screwed into the enlarged internally threaded upper end portion of a part 23 which communicates with the pipe passage 2 between the dies 4:. From an inspection of Fig. 3, it will be readily seen that, when the valve plug 24 is turned from the closed position shown to an open position, oil will pics 7 which project outwardly therefromfor engagement by removable caps 8. Que

plunger into the handle and is formed with an opening 1 1 so that air may pass into the the valve prevents danger of the oil leaking cured by collars 18 to nipples 19 screwed be permitted to flow'through the branch 21 I the valve plunger 12 slidably mounted in g to prevent the formation of a vacuum thereof the conduit and directly onto the portion or" the pipe being threaded. Therefore, the oil will not be wasted as the operator will only allow a sutlicient amount to flow through the port 23 to properly lubricate the pipe for easy cutting of the threads. After all of the oil in the handles has been used, it is merely necessary to remove the cap of the handle at the right in Figs. 1 and 2 and refill the handles.

liavino' thus described the invention,

i. In die construction, a stock having its portions -formed with handlea'eceiving so hets and its intermediate portion formed with a pipe-receiving passage and die seats to mount dies in operative relation to the pipe passage, secured in said hollow handles sockets and constituting oil reservoirs, an uninterrupted conduit connecting said sockets and intermediate its length provided with a branch pipe c i manic-stir vith a passe 1c opening into said pipe passage between said e seats, manual y operated valve to con 'ol t e flow of oil through the branch pipe conduit, and removable closures for the uter ends of said handles. 7

in a the construction, a stock having its end portions formed with handle-receiving sockets, a conduit connecting sockets and intermediate its length provided with a valve controlled branch opening into the pipe passage of said stool: to deposit oil upon a pipe being threaded, and hollow handles secured in said sockets and provided vith removable caps at their outer ends, one cap being formed with an air inlet opening, and an inwardly opening check valve to control the passage of air through said opening.

3. In a die construction, a steel: having its end portions io med with handlencceivinn sockets anl its intermediate portion for ned with a pipe-receiving passage and die seats to mount dies in operative relation to the pipe passage, handles secured in said sockets, one handle being hollow and constituting an oil reservoir, a conduit leading from the socket carrying the-hollow handl and communicating with a passage opensatin ing into said pipe passage between said die seats, a valve for controlling the flow of oil into said pipe passage, an abutment disk in the outer end portion of said hollow handle and formed with an passage, a closure cap; having a head at its end and termed with an air passage aeent its head, a nipple screwed intosaid cap and projecting therefrom and adapted to he screwed into the hollow handle rernovably connect the cap with the handle, said nipplr: having a longitudinally extending bore d with a reduced poi non nting a valve and awalve J7 dable longitudinally in the bore n aple into and out of sealing enp' c with the valve seat and limited in .1 inent away from the valve'seatby engagement wit". said abutment disk.

.i a die construction, a stool: having its ortions formed with handle-receiving ets and its interme late portion if 'pe-receiving p hreading dies in operative relae passage, a conunit connecting extendi across saidpipe vlve control ed branch leading conduit intermediate its length idin longitudinally of the pipe nd communicating with a passage the pipe passage between the leliver oil upon the portion of threaded, hollow handles se- 1 on 1 r utblkl.

pipe urec said sockets and constituting; oil L acles, remova -ole caps for the outer ends said handles, one cap being provided with ir inlet opening, a nipple threaded into last-mentioned cap and cooper lug hanand having the outer end portion of its were reduced to form a valve seat, alve plunger slidab e in said bore for movement into and out of sealing engagement with the valve seat, and a dish in said handle inwardly 01" said nipple to limit movement of the pion r into the handle and formed with an opening to permit passage of air into the handle when the valve plunger is out of sealinn engagement with th valve seat.

In testimony whereoi l afix my signature.

EARL JUSTICE; [1). 

